(KASTANIES, Greece) — Greek authorities were firing tear gas and stun grenades Wednesday morning to repulse a push by migrants to cross its land border from Turkey, as pressure continued along its frontier after Turkey said its own border with Europe was open to whoever wanted to cross.

The clashes were near the border village of Kastanies, along a border fence that covers much of the land border not demarcated by the Evros river running along the frontier.